A sand clock

Description:	One of those old sand clocks used in the middle ages. Not too accurate and of gargantuan size. Maybe if you concentrate enough you can read the hour from its magical runes: <date>.
Armour type:	Talisman
Stats:	+2 wis, -2 dex, -2 str
It looks	Light weight (1.9 kg)
Sacvalue:	22.6k
It is called	clock and identified as 'sand clock', 'clock' and 'talisman'.
It takes the following slot:	Held
Made of:	glass
Size:	Missing size
Quality:	shoddy
From:	Elli the Old Age, Midnight Carnival
Other info:	It is considered "active" all the time, thus feather weight will not last long.